Cosmetic or pharmaceutical composition for skin tautening, skin fixation and wrinkle reduction

Abstract

A cosmetic or pharmaceutical composition contains at least one polymer precursor and at least one polymerization catalyst in the presence of which the at least one polymer precursor polymerizes under the action of light. Also, a process for skin tautening, skin fixation and/or wrinkle reduction includes an elastic, wearable polymer layer being formed on the skin when a polymer precursor and a polymerization catalyst are topically applied on the skin area to be treated and the skin area to be treated is subsequently exposed to light.

1 . A cosmetic or pharmaceutical composition for topical application to the skin, comprising:
 at least one polymer precursor; and   at least one polymerization catalyst, in the presence of which the at least one polymer precursor polymerizes under the action of light.   
     
     
         2 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the at least one polymer precursor is a siloxane. 
     
     
         3 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the at least one polymer precursor is a polyether-modified siloxane. 
     
     
         4 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the at least one polymer precursor is selected from
 a) a combination of at least one:   i) polyorganohydrosiloxane with the following structure:   
       
         
           
           
               
               
           
         
         wherein R 8  represent independent radicals selected from a group consisting of alkyl groups, cycloalkyl groups, phenyl groups, epoxide groups, isocyanate groups, amino groups, alcohol groups, ether groups, ester groups and hydrogen, provided that at least two, but not more than half of all R 8  groups in the siloxane are hydrogens, and wherein m is 0, 1, 2 or 3 and n is a number with a value between 1 and 3000, 
         and at least one 
         ii) polyorganosiloxane with the following structure: 
       
       
         
           
           
               
               
           
         
         wherein R 6  represent independent radicals selected from a group consisting of non-halogenated or halogenated ethylenically unsaturated groups, non-halogenated or halogenated alkyl groups, non-halogenated or halogenated cycloalkyl groups, epoxide groups, isocyanate groups, amino groups, alcohol groups, ether groups, ester groups, phenyl groups, provided that at least 70% of all R 6  groups contain vinyl groups or other alkenyl groups and wherein h is a number with a value between 1 and 3000 and g is 0, 1, 2, or 3, 
         and 
         b) at least one polyorganohydrosiloxane with the following structure: 
       
       
         
           
           
               
               
           
         
         wherein R 8  represent independent radicals selected from a group consisting of alkyl groups, cycloalkyl groups, phenyl groups, epoxide groups, isocyanate groups, amino groups, alcohol groups, ether groups, ester groups, hydrogen and non-halogenated or halogenated ethylenically unsaturated groups, provided that at least two, but not more than half of all R 8  groups in the siloxane are hydrogens and furthermore provided that at least two of the R 8  groups contain vinyl groups or alkenyl groups, wherein m is 0, 1, 2 or 3 and n is a number with a value between 1 and 3000. 
       
     
     
         5 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the polymerization catalyst is a compound which comes under the general formula (I) 
       
         
           
           
               
               
           
         
         wherein 
         n=1−8, 
         o=0−2, 
         p=1−3 and o+p=3 
         and the substituents R 1  are identical or different and are in each case, independently of one another, a monovalent, unsubstituted or substituted, linear, cyclic or branched hydrocarbon radical, which contains aliphatically saturated and unsaturated or aromatic radicals and has 1-30 carbon atoms in which individual carbon atoms can be replaced by O, N, S or P atoms, 
         the substituents R 2  are hydrolyzable functional groups, identical or different from one another, selected from a group consisting of: 
         carboxy of the general formula —O—C(O)R 4 , 
         oxime of the general formula —O—N═CR 4   2 , 
         alkoxy of the general formula —OR 4 , 
         alkenyloxy of the general formula —O—R 6 , 
         amide of the general formula —NR 4 —C(O)R 5 , 
         amine of the general formula —NR 4 R 5 , 
         amineoxy of the general formula —O—NR 4 R 5 , 
         wherein 
         the radicals R 4  are identical or different and are in each case, independently of one another, H, alkyl, aryl, arylalkyl or alkylaryl, 
         the substituents R 5  are identical or different and are in each case, independently of one another, alkyl, aryl, arylalkyl, or alkylaryl, 
         R 6  is a linear or branched, aliphatically unsaturated radical, 
         the substituents R 3 a are identical or different and are in each case, independently of one another, alkyl, aryl, arylalkyl or alkylaryl, wherein these have 1-30 carbon atoms, wherein the hydrogen atoms can be replaced by -Hal or —SiR 3   3 , 
         the substituents R 3  are identical or different and are in each case, independently of one another, monovalent, unsubstituted or substituted, linear, cyclic or branched hydrocarbon radicals, 
         the substituents R 3b  are identical or different and are in each case, independently of one another, hydrogen or a monovalent, unsubstituted or substituted, linear or branched hydrocarbon radical, wherein this contains an aliphatically saturated or unsaturated or aromatic radical and has 1-30 carbon atoms and in which the individual carbon atoms can be replaced by O, N, S or P atoms. 
       
     
     
         6 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the polymerization catalyst is a compound which comes under the general formula (II), 
       
         
           
           
               
               
           
         
         wherein 
         Cp represents a cyclopentadienyl group which is η-bonded to the platinum atom, wherein the cyclopentadienyl group is optionally mono- or polysubstituted by radicals which do not interfere with the hydrosilylation reaction, and 
         each of the radicals R 1 , R 2  and R 3  represents an aliphatic or aromatic group with 1-18 carbon atoms, wherein R 1 , R 2  and R 3  are a-bonded to the platinum atom, 
         and wherein the composition additionally contains at least one photosensitizer which is suitable for transferring the absorbed light energy to the polymerization catalyst. 
       
     
     
         7 . The cosmetic or pharmaceutical composition according to  claim 6 , wherein the at least one photosensitizer is a compound which is selected from a group consisting of polycyclic aromatics with 2-5 rings, thioxanthones, 2-chlorothioxanthones, 2-isopropylthioxanthones, aromatic compounds with at least one ketone chromophore and combinations thereof. 
     
     
         8 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the composition additionally contains a particle phase which consists of particles which are selected from a group consisting of: silicones, starch and starch derivatives, cellulose powders, polymer powders comprising polyolefins, polycarbonates, polyurethanes, polyamides, polyesters, polystyrenes, polyacrylates, polymethacrylates, (meth)acrylate or (meth)acrylate-vinylidene copolymers, Teflon or combinations thereof. 
     
     
         9 . The cosmetic or pharmaceutical composition according to  claim 1 , wherein the composition contains decorative pigments and/or dyes selected from a group consisting of metal-effect pigments, pearlescent pigments, luminescent pigments, natural organic pigments or synthetic organic pigments. 
     
     
         10 . A non-therapeutic method comprising applying, to skin, a cosmetic composition according to  claim 1  for skin tautening, wrinkle reduction or for visually concealing skin wrinkles, cracks in the skin, dry skin and/or scar tissue of the skin and/or skin areas with pigmentary abnormality. 
     
     
         11 . A non-therapeutic method comprising applying, to skin, a cosmetic composition according to  claim 1  for shaping and/or fixing the skin in a desired position and/or for shaping and/or fixing one's own hair, someone else's hair or artificial hair. 
     
     
         12 . A non-therapeutic method comprising applying, to skin, a cosmetic composition according to  claim 1  for the removal of body hairs. 
     
     
         13 . A non-therapeutic method comprising applying, to skin, a cosmetic composition according to  claim 1 , wherein the compositions is applied as a liquid plaster, ready-made elastic plaster, surgical wound closure, blister plaster, active-ingredient plaster or spray-on plaster. 
     
     
         14 . A process for the production of an elastic, wearable polymer layer on the skin, wherein the process comprises the following process steps:
 a) topical application of a polymer precursor, as defined in one of the preceding claims, to the skin area to be treated,   b) topical application of a polymerization catalyst, as defined in one of the preceding claims, to the skin area to be treated,   c) optionally topical application of a photosensitizer, as defined in one of the preceding claims, to the skin area to be treated, and   d) exposure of the skin area to be treated to light,   wherein the sequence in which the process steps are carried out can be varied, with the proviso that process step d) is always the last process step.   
     
     
         15 . The process according to  claim 14 , wherein the exposure of the skin area to be treated to light according to process step d) is effected by irradiation with visible light of a wavelength in the range of 400-800 nm.